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[Bug Report] 8 chan cross-mixer does not grow correctly

SigmaDSP & SigmaStudio ggilles Feb 17, 2012 00:00 1 replies Original on forum ↗
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ggilles Question
Feb 17, 2012 00:00

When growing an 8 chan cross-mixer, the gains don't behave properly.

For other cross-mixers (2 channels and 3 channels), each column of gains represents the combination of signal inputs that the corresponding output will get. For example, if all gains in column 2 are set to -100dB, output 2 will have nearly no signal.

This is not true for 8 channel mixers. What happens is this: for output N, the signal will be: (what is normally expected) + all signals of previous the columns/output.

Here is an example: only gain 1 of column 1 is at 0dB, but the signal on output 2 is the same as on output 1.

I also attach the dspproj file demonstrating the issue.

Best,

PS: I use the latest SigmaStudio (3.5) on a up-to-date windows XP SP3.

bug_report

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Natan Reply
Feb 20, 2012 00:00

I have seen this bug as well. Brett has stated that the next release should contain a fix. See post here: https://ez.analog.com/message/38740#38740